added sender ID to the clients Tab in Show view plus bug fixes

app/Models/SystemCredential.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class SystemCredential extends Model{
+
+  protected $guarded = array('id');
+  public $table = "sys_credentials";
+
+  public function modified_by_info(){
+    return $this->hasOne('App\Models\SystemUser', 'id', 'last_modified_by_id');
+  }
+  public function network_info(){
+    return $this->hasOne('App\Models\NetworkOps', 'id', 'network_id');
+  }
+  public function client_info(){
+    return $this->hasOne('App\Models\Client', 'id', 'client_id');
+  }
+  public function created_by_info(){
+    return $this->hasOne('App\Models\SystemUser', 'id', 'created_by_id');
+  }
+}